EP2102455A1 - Switchable support element for a valve drive of an internal combustion engine - Google Patents

Switchable support element for a valve drive of an internal combustion engine

Info

Publication number
EP2102455A1
EP2102455A1 EP07847766A EP07847766A EP2102455A1 EP 2102455 A1 EP2102455 A1 EP 2102455A1 EP 07847766 A EP07847766 A EP 07847766A EP 07847766 A EP07847766 A EP 07847766A EP 2102455 A1 EP2102455 A1 EP 2102455A1
Authority
EP
European Patent Office
Prior art keywords
housing
coupling means
coupling
slide
inner element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP07847766A
Other languages
German (de)
French (fr)
Other versions
EP2102455B1 (en
Inventor
Bodo RÖRIG
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler Technologies AG and Co KG
Schaeffler KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schaeffler Technologies AG and Co KG, Schaeffler KG filed Critical Schaeffler Technologies AG and Co KG
Publication of EP2102455A1 publication Critical patent/EP2102455A1/en
Application granted granted Critical
Publication of EP2102455B1 publication Critical patent/EP2102455B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/20—Adjusting or compensating clearance
    • F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
    • F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
    • F01L1/2405—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically by means of a hydraulic adjusting device located between the cylinder head and rocker arm
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0005—Deactivating valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2307/00—Preventing the rotation of tappets

Definitions

  • the invention relates to a switchable supporting element for a valve train of an internal combustion engine, with a housing which can be arranged via its outer casing in a receptacle of the internal combustion engine and in the bore an axially movable, with its head an edge of the housing superior inner element extends, wherein the support element coupling means are selectively associated with the housing for selectively coupling the inner member in its axially extended position, which inner member is acted upon from the housing by at least one lost-motion spring.
  • Such a support element in this case of a hydraulic design, is evident from EP 1 411 214 A2, which is considered to constitute the structure.
  • a particular disadvantage is the relatively large height, caused inter alia by the superposed arrangement of Lost-motion spring, coupling mechanism and hydraulic unit.
  • the piston arranged in the inner element can be removed as a coupling means in the case of a desired disassembly (for example, for adjusting the coupling play) only with difficulty.
  • solutions are previously known in which a corresponding slide is arranged as a coupling means laterally in the cylinder head and in the coupling case in a corresponding engagement surface of the support element is displaced. The person skilled in the art recognizes that costly changes to the cylinder head design are required here and that such a device requires an unnecessary amount of space laterally.
  • the object of the invention is therefore to provide a support element of the aforementioned type, in which the cited disadvantages are eliminated.
  • this object is achieved in that at least one slide is provided as a coupling means, which is positioned in the decoupling case in a radially or secant extending guide of the housing and, starting from its radially inner end, a flattened top is immanent over which he im Coupling case with a flattened bottom of a recess in the outer shell of the inner member is engageable.
  • the support element is provided with a hydraulic lash adjuster known per se, wherein also mechanical lash adjuster variants are conceivable and provided.
  • mechanical lash adjuster variants are conceivable and provided.
  • the idea of the invention can be realized with only one slider as a coupling agent, but it is particularly advantageous if two diametrically opposed slide are provided as coupling means. It is particularly thought of piston-like elements which, starting from their radially inner end face, are flattened at their top and engage according to a particularly useful development of the invention in a recess on the outer surface of the inner element, which recess is shown as a transverse slot with secant-even slit bottom ,
  • a coupling means a ring segment or a sickle-like design in question, which is also intended to a circumferential or partially circumferential groove on the outer surface of the inner element for the coupling case.
  • an anti-twist device for the slide or slides can be represented as a coupling means via this clip-like spring, for example by providing the end pieces with a radii-like curvature or the like, which convexity then in a correspondingly complementary longitudinal slot on the outer face of the Coupling agent is inserted.
  • an anti-rotation device such as a pin or a ball, is provided between the inner element and the housing. Possibly. In this area, the inner element can also be secured against rotation by being flattened against the housing.
  • the coupling play can also be adjusted by means of sliders grouped in relation to a height of their flattened top.
  • a return displacement of the slide in Entkoppelraum completely in the leadership of the housing is expedient hen hen over hydraulic means hen provided. This can be passed through an annular groove on the outer surface of the housing and at least one transverse bore frontally inside the corresponding slide.
  • At least one helical compression spring or the like is proposed as a lost-motion spring, which at one end acts against a lower side of the inner element and at the other end against a bottom of the housing.
  • the bottom of the inner element may also be stepped, so that the lost-motion spring at least partially surrounds a high-pressure chamber in the inner element.
  • Figure 1 shows a longitudinal section through an inventive support member in the region of the slide
  • Figure 2 shows a longitudinal section of Figure 1, rotated by 90 ° with
  • Figure 3 shows an enlarged cross-section through the support member in the region of the slide.
  • a switchable support element 1 for a valve train of an internal combustion engine This consists of a pot-like housing 2, in the bore 4 axially movable an inner element 6 is added, which projects beyond an edge 7 of the housing 2 with its head 5.
  • the head 5 is part of a built-in a bore 29 of the inner member 6 pressure piston 31 a hydraulic lash adjuster.
  • the latter pressure piston 31 has at its head-far region a transverse web 32 with a check valve 33 which opens in the direction of an underlying high-pressure chamber 35 which is bounded by a base 34 of the inner member 6 in the direction of the head.
  • a lost-motion spring 9 which is designed as a spring assembly.
  • two diametrically opposed slides are applied as coupling means 8. These sit in respective guides 10 of the housing 2 and have, starting from their respective radially inner end 11, stepped tops 12.
  • the coupling means 8 are shown in their coupling status (FIG. 1), wherein the flat tops 12 communicate with flat undersides 13 of corresponding recesses 14 in the outer jacket 15 of the inner element 6.
  • the recesses 14 are, as best seen in Figure 3 can be seen as a transverse slots with secant-even slit bottom 16 shown.
  • This acts with its end pieces 18 on outer end faces 19 of the slide as a coupling means 8 a.
  • a guide and captive for the spring 16a is provided via a circumferential groove 17 on the outer casing 3 of the housing 2, wherein the end pieces 18 of the spring 16a, which are shown here vaulted curved, at the same time form-fitting manner in longitudinal slots 20 of the outer end faces 19 of the slide as coupling means run.
  • FIGS. 2, 3 disclose that the inner element 6 is held in relation to the housing 2 by means of a pin-like anti-rotation device 21.
  • This rotation 21 is stationary in a recess 22 in the housing 2.
  • the inner element 6 experiences a travel limit in its two directions of travel, optionally also in the axially extended state, a coupling play of the head pelstoff 8 can be displayed. Due to the latter rotation, a secure position assignment of the slider is created as a coupling means 8 with respect to their recesses 14.
  • a return displacement of the slide as coupling means 8 in Entkoppelraum is provided via hydraulic means.
  • an annular groove 38 from which two opposite transverse bores 39 are guided through the housing 2, of which the hydraulic fluid can be conducted in an annular space in front of the radially inner forehead 11 of the slide as coupling means 8.
  • the radially inner forehead 11 of the slide are designed to be spherical as a coupling means 8, so that a "good" Herantechnisch the hydraulic fluid is ensured.
  • the illustrated housing 2 may be solid or formed as a deep-drawn or extruded lightweight component.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

The invention proposes a switchable support element (1) for a valve drive of an internal combustion engine, comprising a housing (2), which via the outer shell (3) thereof can be disposed in a receiving portion of the internal combustion engine and in the bore (4) of which an axially displaceable inner element (6) extends, which with the head (5) thereof protrudes over a rim (7) of the housing (2), wherein the support element (1) is associated with coupling means (8) for the selective coupling of the inner element (7) in the axially extended position thereof to the housing (2), wherein a lost motion spring (9) acts on the inner element (6) out of the housing (2). The coupling means (8) are configured as at least one slide, which in a decoupled state is positioned in a radially or secant-like extending guide (10) of the housing (2) and which, starting from the radially inner face (11) thereof, comprises a flattened top (13), via which it can engage in the outer shell (15) of the inner element (7) with a flattened bottom (13) of a recess (14) in the coupled state.

Description

Bezeichnung der Erfindung Name of the invention
Schaltbares Abstützelement für einen Ventiltrieb einer BrennkraftmaschineSwitchable support element for a valve train of an internal combustion engine
Beschreibungdescription
Gebiet der ErfindungField of the invention
Die Erfindung betrifft ein schaltbares Abstützelement für einen Ventiltrieb einer Brennkraftmaschine, mit einem Gehäuse, das über seinen Außenmantel in einer Aufnahme der Brennkraftmaschine anordenbar ist und in dessen Bohrung ein axial bewegliches, mit seinem Kopf einen Rand des Gehäuses überragendes Innenelement verläuft, wobei dem Abstützelement Koppelmittel zum wahlweisen Koppeln des Innenelements in dessen axial ausgefahrener Position mit dem Gehäuse zugeordnet sind, welches Innenelement aus dem Gehäuse heraus durch wenigstens eine Lost-Motion-Feder beaufschlagt ist.The invention relates to a switchable supporting element for a valve train of an internal combustion engine, with a housing which can be arranged via its outer casing in a receptacle of the internal combustion engine and in the bore an axially movable, with its head an edge of the housing superior inner element extends, wherein the support element coupling means are selectively associated with the housing for selectively coupling the inner member in its axially extended position, which inner member is acted upon from the housing by at least one lost-motion spring.
Hintergrund der ErfindungBackground of the invention
Ein derartiges Abstützelement, hier hydraulischer Bauart, geht aus der als gat- tungsbildend betrachteten EP 1 411 214 A2 hervor. Nachteilig ist insbesondere dessen relativ große Bauhöhe, hervorgerufen u. a. durch die übereinander geschachtelte Anordnung von Lost-Motion-Feder, Koppelmechanismus und Hydraulikeinheit. Außerdem wird festgestellt, dass sich die im Innenelement angeordneten Kolben als Koppelmittel im Falle einer gewünschten Demontage (beispielsweise zur Einstellung des Koppelspiels) nur erschwert entfernen lassen. Außerdem sind Lösungen vorbekannt, bei denen ein entsprechender Schieber als Koppelmittel lateral im Zylinderkopf angeordnet und im Koppelfall in eine entsprechende Eingriffsfläche des Abstützelements verlagerbar ist. Der Fachmann erkennt, dass hier aufwändige Änderungen am Zylinderkopfdesign erforderlich sind und dass eine derartige Vorrichtung seitlich unnötig viel Bauraum benötigt.Such a support element, in this case of a hydraulic design, is evident from EP 1 411 214 A2, which is considered to constitute the structure. A particular disadvantage is the relatively large height, caused inter alia by the superposed arrangement of Lost-motion spring, coupling mechanism and hydraulic unit. In addition, it is found that the piston arranged in the inner element can be removed as a coupling means in the case of a desired disassembly (for example, for adjusting the coupling play) only with difficulty. In addition, solutions are previously known in which a corresponding slide is arranged as a coupling means laterally in the cylinder head and in the coupling case in a corresponding engagement surface of the support element is displaced. The person skilled in the art recognizes that costly changes to the cylinder head design are required here and that such a device requires an unnecessary amount of space laterally.
Aufgabe der ErfindungObject of the invention
Aufgabe der Erfindung ist es daher, ein Abstützelement der vorgenannten Gattung zu schaffen, bei dem die zitierten Nachteile beseitigt sind.The object of the invention is therefore to provide a support element of the aforementioned type, in which the cited disadvantages are eliminated.
Lösung der AufgabeSolution of the task
Erfindungsgemäß wird diese Aufgabe dadurch gelöst, dass als Koppelmittel wenigstens ein Schieber vorgesehen ist, der im Entkoppelfall in einer radial oder sekantenartig verlaufenden Führung des Gehäuses positioniert ist und dem, ausgehend von seiner radial inneren Stirn, eine abgeflachte Oberseite immanent ist, über die er im Koppelfall mit einer abgeflachten Unterseite einer Ausnehmung im Außenmantel des Innenelements in Eingriff bringbar ist.According to the invention, this object is achieved in that at least one slide is provided as a coupling means, which is positioned in the decoupling case in a radially or secant extending guide of the housing and, starting from its radially inner end, a flattened top is immanent over which he im Coupling case with a flattened bottom of a recess in the outer shell of the inner member is engageable.
Hierdurch sind die vorgenannten Nachteile beseitigt. Das anmeldungsgemäße Abstützelement baut axial relativ niedrig und erfordert auch in radialer Richtung keinen oder nur einen geringfügig erhöhten Bauraum, wobei nicht mit den aufwändigen Änderungen im Zylinderkopfbereich zu rechnen ist, wie im beschreibungseinleitend zitierten Stand der Technik aufgeführt.As a result, the aforementioned disadvantages are eliminated. The application according to the support member builds axially relatively low and requires no or only slightly increased space in the radial direction, which is not expected to be the costly changes in the cylinder head area, as listed in the introductory cited prior art.
Besonders vorteilhaft ist es, wenn das Abstützelement mit einer an sich bekannten hydraulischen Spielausgleichsvorrichtung versehen ist, wobei auch mechanische Spieleinstellvarianten denkbar und vorgesehen sind. Der Erfindungsgedanke lässt sich zwar auch mit nur einem Schieber als Koppelmittel verwirklichen, jedoch ist es besonders vorteilhaft, wenn zwei sich diametral gegenüberliegende Schieber als Koppelmittel vorgesehen sind. Dabei ist insbesondere an kolbenartige Elemente gedacht, die, ausgehend von ihrer radial inneren Stirnseite, an ihrer Oberseite abgeflacht sind und gemäß einer besonders zweckmäßigen Fortbildung der Erfindung in eine Ausnehmung am Außenmantel des Innenelements eingreifen, welche Ausnehmung als Querschlitz mit sekantenartig-geradem Schlitzgrund dargestellt ist.It is particularly advantageous if the support element is provided with a hydraulic lash adjuster known per se, wherein also mechanical lash adjuster variants are conceivable and provided. Although the idea of the invention can be realized with only one slider as a coupling agent, but it is particularly advantageous if two diametrically opposed slide are provided as coupling means. It is particularly thought of piston-like elements which, starting from their radially inner end face, are flattened at their top and engage according to a particularly useful development of the invention in a recess on the outer surface of the inner element, which recess is shown as a transverse slot with secant-even slit bottom ,
Alternativ kommt je Schieber als Koppelmittel auch ein Ringsegment oder eine sichelartige Gestaltung infrage, wobei auch an eine umlaufende oder teilumlaufende Ringnut am Außenmantel des Innenelements für den Koppelfall gedacht ist.Alternatively comes per slider as a coupling means, a ring segment or a sickle-like design in question, which is also intended to a circumferential or partially circumferential groove on the outer surface of the inner element for the coupling case.
Selbstverständlich erschließen sich dem Fachmann an dieser Stelle noch weitere Ausbildungen der Koppelmittel. So können diese auch als Flachschieber o. dgl. ausgebildet sein. Ggf. ist auch eine Lösung denkbar und vorgesehen, bei der mehrere sternförmig umfangsverteilte Schieber als Koppelmittel im Gehäuse vorgesehen sind.Of course, further developments of the coupling means will become apparent to those skilled in the art at this point. So they can also be designed as a flat slide o. The like. Possibly. is also a solution conceivable and provided, in which a plurality of star-shaped circumferentially distributed slide are provided as coupling means in the housing.
Aufgrund der vorgeschlagenen abgeflachten Koppelstruktur ist mit lediglich geringen Flächenpressungen im Koppelbereich zu rechnen.Due to the proposed flattened coupling structure is expected only low surface pressures in the coupling region.
Als einfaches und bauraumsparendes Verlagerungsmittel für den oder die Schieber in Koppelrichtung ist es vorgeschlagen, am Außenmantel des Gehäuses wenigstens eine klammerähnliche Feder zu applizieren, deren Endstücke auf äußere Stirnseiten der Schieber als Koppelmittel einwirken. Gleichzeitig kann über diese klammerähnliche Feder eine Verdrehsicherung für den oder die Schieber als Koppelmittel dargestellt werden, indem bspw. die Endstücke jeweils mit einer radienhaften Einwölbung o. dgl. versehen sind, welche Ein- wölbung dann in einem entsprechend komplementären Längsschlitz an der äußeren Stirnseite des Koppelmittel einsitzt. Alternativ kann es vorgesehen sein, „glatte" Endstücke in einem Umfangsschlitz je Schieber verlaufen zu lassen.As a simple and space-saving displacement means for the slide or in the coupling direction, it is proposed to apply at least one clip-like spring on the outer casing of the housing, the end pieces act on outer end faces of the slide as a coupling agent. At the same time, an anti-twist device for the slide or slides can be represented as a coupling means via this clip-like spring, for example by providing the end pieces with a radii-like curvature or the like, which convexity then in a correspondingly complementary longitudinal slot on the outer face of the Coupling agent is inserted. Alternatively, it may be provided be to run "smooth" end pieces in a circumferential slot per slide.
Vorteilhaft ist es zudem, wenn zwischen Innenelement und Gehäuse eine Ver- drehsicherung wie ein Stift oder eine Kugel vorgesehen ist. Ggf. kann in diesem Bereich auch über Anflachungen das Innenelement gegenüber dem Gehäuse verdrehgesichert sein.Moreover, it is advantageous if an anti-rotation device, such as a pin or a ball, is provided between the inner element and the housing. Possibly. In this area, the inner element can also be secured against rotation by being flattened against the housing.
Im Falle der Verwendung eines Stiftes kann dieser in zweckmäßiger Konkreti- sierung der Erfindung mit einer abgeflachten Unter- und Oberseite versehen sein, so dass beidendige Höhenanschläge für das Innenelement gegenüber dem Gehäuse vorliegen. Ggf. kann auch nur ein einenendiger Höhenanschlag dargestellt sein.In the case of the use of a pin this can be provided in expedient concretization of the invention with a flattened bottom and top, so that there are both end stops for the inner member relative to the housing. Possibly. can also be shown only a one-end height stop.
Außerdem ist es denkbar und vorgesehen, über den Stift als Verdrehsicherung ein Koppelspiel einzustellen, das an dieser Stelle nicht näher erläutert werden muss, wobei dann im Montageprozess Stifte vorgehalten werden, die hinsichtlich einer Höhe ihrer Unterseite gruppiert sind.In addition, it is conceivable and intended to set a coupling play on the pin as rotation, which does not need to be explained in detail here, in which case pins are held in the assembly process, which are grouped with respect to a height of their bottom.
Alternativ hierzu kann das Koppelspiel auch über hinsichtlich einer Höhe ihrer abgeflachten Oberseite gruppiert vorgehaltene Schieber eingestellt werden.Alternatively, the coupling play can also be adjusted by means of sliders grouped in relation to a height of their flattened top.
Eine Rückverlagerung der Schieber in Entkoppelrichtung vollständig in die Führung des Gehäuses ist zweckmäßigerweise über Hydraulikmittel vorgese- hen. Dieses kann über eine Ringnut am Außenmantel des Gehäuses und wenigstens eine Querbohrung stirnseitig innen vor die entsprechenden Schieber geleitet werden.A return displacement of the slide in Entkoppelrichtung completely in the leadership of the housing is expedient hen hen over hydraulic means hen provided. This can be passed through an annular groove on the outer surface of the housing and at least one transverse bore frontally inside the corresponding slide.
Als Lost-Motion-Feder ist wenigstens eine Schraubendruckfeder o. dgl. vorge- schlagen, die einenends gegen eine Unterseite des Innenelements und ande- renends gegen einen Boden des Gehäuses wirkt. Zur weiteren Verringerung der Bauhöhe kann der Grund des Innenelements auch gestuft ausgebildet sein, so dass die Lost-Motion-Feder zumindest teilumfänglich einen Hochdruckraum im Innenelement umschließt.At least one helical compression spring or the like is proposed as a lost-motion spring, which at one end acts against a lower side of the inner element and at the other end against a bottom of the housing. To further reduce the height, the bottom of the inner element may also be stepped, so that the lost-motion spring at least partially surrounds a high-pressure chamber in the inner element.
Kurze Beschreibung der ZeichnungShort description of the drawing
Die Erfindung ist anhand der Zeichnung näher erläutert. Es zeigen:The invention is explained in more detail with reference to the drawing. Show it:
Figur 1 einen Längsschnitt durch ein erfindungsgemäßes Abstützelement im Bereich dessen Schieber;Figure 1 shows a longitudinal section through an inventive support member in the region of the slide;
Figur 2 einen Längsschnitt nach Figur 1 , um 90° gedreht mitFigure 2 shows a longitudinal section of Figure 1, rotated by 90 ° with
Verdrehsicherung und dieAnti-rotation and the
Figur 3 einen vergrößert dargestellten Querschnitt durch das Abstützelement im Bereich der Schieber.Figure 3 shows an enlarged cross-section through the support member in the region of the slide.
Ausführliche Beschreibung der ZeichnungDetailed description of the drawing
Dargestellt ist ein schaltbares Abstützelement 1 für einen Ventiltrieb einer Brennkraftmaschine. Dies besteht aus einem topfartigen Gehäuse 2, in dessen Bohrung 4 axial beweglich ein Innenelement 6 aufgenommen ist, das mit seinem Kopf 5 einen Rand 7 des Gehäuses 2 überragt. Der Kopf 5 ist Bestandteil eines in einer Bohrung 29 des Innenelements 6 eingebauten Druckkolbens 31 einer hydraulischen Spielausgleichsvorrichtung.Shown is a switchable support element 1 for a valve train of an internal combustion engine. This consists of a pot-like housing 2, in the bore 4 axially movable an inner element 6 is added, which projects beyond an edge 7 of the housing 2 with its head 5. The head 5 is part of a built-in a bore 29 of the inner member 6 pressure piston 31 a hydraulic lash adjuster.
Der letztgenannte Druckkolben 31 hat an seinem kopffernen Bereich einen Quersteg 32 mit einem Rückschlagventil 33, das sich in Richtung zu einem darunter liegenden Hochdruckraum 35 öffnet, der durch einen Grund 34 des Innenelements 6 in kopfferne Richtung begrenzt ist. Zwischen dem Grund 34 des lnnenelements 6 und einem Boden 37 des Gehäuses 2 verläuft eine Lost-Motion-Feder 9, die als Federpaket ausgeführt ist.The latter pressure piston 31 has at its head-far region a transverse web 32 with a check valve 33 which opens in the direction of an underlying high-pressure chamber 35 which is bounded by a base 34 of the inner member 6 in the direction of the head. Between the base 34 of the inner element 6 and a bottom 37 of the housing 2 extends a lost-motion spring 9, which is designed as a spring assembly.
Im Gehäuse 2 sind zwei sich diametral gegenüber liegende Schieber als Kop- pelmittel 8 appliziert. Diese sitzen in respektiven Führungen 10 des Gehäuses 2 und haben, ausgehend von ihrer jeweiligen radial inneren Stirn 11 , gestufte Oberseiten 12.In the housing 2, two diametrically opposed slides are applied as coupling means 8. These sit in respective guides 10 of the housing 2 and have, starting from their respective radially inner end 11, stepped tops 12.
Die Koppelmittel 8 sind in ihrem Koppelstatus dargestellt (Fig. 1 ), wobei die flachen Oberseiten 12 mit flachen Unterseiten 13 von entsprechenden Ausnehmungen 14 im Außenmantel 15 des Innenelements 6 kommunizieren. Die Ausnehmungen 14 sind, wie am besten aus Figur 3 ersichtlich ist, als Querschlitze mit sekantenartig-geradem Schlitzgrund 16 dargestellt.The coupling means 8 are shown in their coupling status (FIG. 1), wherein the flat tops 12 communicate with flat undersides 13 of corresponding recesses 14 in the outer jacket 15 of the inner element 6. The recesses 14 are, as best seen in Figure 3 can be seen as a transverse slots with secant-even slit bottom 16 shown.
Eine Verlagerung der Schieber als Koppelmittel 8 radial nach innen in ihre Koppelrichtung erfolgt über die Kraft einer bügelähnlichen, nach innen vorgespannten Feder 16a. Diese wirkt mit ihren Endstücken 18 auf äußere Stirnseiten 19 der Schieber als Koppelmittel 8 ein. Eine Führung und Verliersicherung für die Feder 16a ist über eine Umlaufnut 17 am Außenmantel 3 des Gehäuses 2 geschaffen, wobei die Endstücke 18 der Feder 16a, die hier radienhaft eingewölbt dargestellt sind, gleichzeitig formschlüssig in Längsschlitzen 20 der äußeren Stirnseiten 19 der Schieber als Koppelmittel 8 verlaufen. Somit ist eine einfache Verdrehsicherung für die Schieber als Koppelmittel 8 gegenüber ihren Führungen 10 geschaffen.A displacement of the slide as a coupling means 8 radially inwardly in its coupling direction via the force of a bow-like, inwardly biased spring 16a. This acts with its end pieces 18 on outer end faces 19 of the slide as a coupling means 8 a. A guide and captive for the spring 16a is provided via a circumferential groove 17 on the outer casing 3 of the housing 2, wherein the end pieces 18 of the spring 16a, which are shown here vaulted curved, at the same time form-fitting manner in longitudinal slots 20 of the outer end faces 19 of the slide as coupling means run. Thus, a simple rotation for the slide as a coupling means 8 is created with respect to their guides 10.
Gleichzeitig offenbaren die Figuren 2, 3, dass das Innenelement 6 über eine stiftartige Verdrehsicherung 21 gegenüber dem Gehäuse 2 gehalten ist. Diese Verdrehsicherung 21 verläuft ortsfest in einer Ausnehmung 22 im Gehäuse 2. Der Verdrehsicherung 21 ist, ausgehend von ihrer radial inneren Stirnseite 24, je eine abgeflachte Unter- und Oberseite 25, 26 immanent. Hierüber erfährt das Innenelement 6 eine Wegbegrenzung in dessen beide Verfahrrichtungen, wobei wahlweise auch im axial ausgefahrenen Zustand ein Koppelspiel der Kop- pelmittel 8 darstellbar ist. Aufgrund der letztgenannten Verdrehsicherung wird eine sichere Lagezuordnung der Schieber als Koppelmittel 8 gegenüber ihren Ausnehmungen 14 geschaffen.At the same time, FIGS. 2, 3 disclose that the inner element 6 is held in relation to the housing 2 by means of a pin-like anti-rotation device 21. This rotation 21 is stationary in a recess 22 in the housing 2. The anti-rotation 21, starting from its radially inner end face 24, depending on a flattened bottom and top 25, 26 immanent. In this way, the inner element 6 experiences a travel limit in its two directions of travel, optionally also in the axially extended state, a coupling play of the head pelmittel 8 can be displayed. Due to the latter rotation, a secure position assignment of the slider is created as a coupling means 8 with respect to their recesses 14.
Eine Rückverlagerung der Schieber als Koppelmittel 8 in Entkoppelrichtung ist über Hydraulikmittel vorgesehen. Hierbei verläuft am Außenmantel 3 des Gehäuses 2 eine Ringnut 38, von der aus zwei sich gegenüber liegende Querbohrungen 39 durch das Gehäuse 2 geführt sind, von denen das Hydraulikmittel in einen Ringraum vor die radial inneren Stirnen 11 der Schieber als Koppelmittel 8 leitbar ist. Wie zu erkennen ist, sind die radial inneren Stirnen 11 der Schieber als Koppelmittel 8 ballig ausgeführt, so dass eine „gute" Heranleitung des Hydraulikmittels gewährleistet ist.A return displacement of the slide as coupling means 8 in Entkoppelrichtung is provided via hydraulic means. Here, on the outer casing 3 of the housing 2, an annular groove 38, from which two opposite transverse bores 39 are guided through the housing 2, of which the hydraulic fluid can be conducted in an annular space in front of the radially inner forehead 11 of the slide as coupling means 8. As can be seen, the radially inner forehead 11 of the slide are designed to be spherical as a coupling means 8, so that a "good" Heranleitung the hydraulic fluid is ensured.
Das dargestellte Gehäuse 2 kann massiv oder auch als tiefgezogenes bzw. fließgepresstes Leichtbauteil ausgebildet sein. The illustrated housing 2 may be solid or formed as a deep-drawn or extruded lightweight component.
Liste der BezugszahlenList of reference numbers
1 ) Abstützelement 30)Vorratsraum1) supporting element 30) storage space
2) Gehäuse 31 )Druckkolben2) housing 31) pressure piston
3) Außenmantel 35 32)Quersteg3) Outer jacket 35 32) Crosspiece
4) Bohrung 33)Rückschlagventil4) Bore 33) Check valve
5) Kopf 34)Grund5) head 34) reason
6) lnnenelement 35)Hochdruckraum6) inner element 35) high-pressure chamber
7) Rand 36)Unterseite7) edge 36) bottom
8) Koppelmittel (Schieber) 40 37)Boden8) coupling agent (slide) 40 37) bottom
9) Lost-Motion-Feder 38)Ringnut 10)Führung 39)Querbohrung 11 )Stirn 12)Oberseite 13)Unterseite 45 14)Ausnehmung 15)Außenmantel 16)Schlitzgrund 16a)Feder 17)Umlaufnut 18)Endstück 19)äußere Stirnseite 20)Längsschlitz9) Lost motion spring 38) annular groove 10) guide 39) transverse bore 11) brow 12) upper side 13) underside 45 14) recess 15) outer jacket 16) slot bottom 16a) spring 17) circumferential groove 18) end piece 19) outer face 20) longitudinal slot
21 )Verdrehsicherung21) anti-rotation
22)Ausnehmung22) recess
23)Längsaussparung23) longitudinal recess
24)innere Stirnseite24) inner end face
25)Unterseite25) Base
26)Oberseite26) top
27)Anschlagfläche27) stop surface
28)Anschlagfläche28) stop surface
29)Bohrung 29) bore

Claims

Patentansprüche claims
1. Schaltbares Abstützelement (1 ) für einen Ventiltrieb einer Brennkraftma- schine, mit einem Gehäuse (2), das über seinen Außenmantel (3) in einer Aufnahme der Brennkraftmaschine anordenbar ist und in dessen Bohrung (4) ein axial bewegliches, mit seinem Kopf (5) einen Rand (7) des Gehäuses (2) überragendes Innenelement (6) verläuft, wobei dem Abstützelement (1 ) Koppelmittel (8) zum wahlweisen Koppeln des In- nenelements (7) in dessen axial ausgefahrener Position mit dem Gehäuse (2) zugeordnet sind, welches Innenelement (6) aus dem Gehäuse (2) heraus durch wenigstens eine Lost-Motion-Feder (9) beaufschlagt ist, dadurch gekennzeichnet, dass die Koppelmittel (8) als wenigstens ein Schieber ausgebildet sind, der im Entkoppelfall in einer radial oder sekantenartig verlaufenden Führung (10) des Gehäuses (2) positioniert ist und dem, ausgehend von seiner radial inneren Stirn (11 ), eine abgeflachte Oberseite (12) immanent ist, über die er im Koppelfall mit einer abgeflachten Unterseite (13) einer Ausnehmung (14) im Außenmantel (15) des Innenelements (7) in Eingriff bringbar ist.1. Switchable support element (1) for a valve train of an internal combustion engine, with a housing (2) which can be arranged over its outer casing (3) in a receptacle of the internal combustion engine and in the bore (4) an axially movable, with his head (5) an inner element (6) projecting beyond an edge (7) of the housing (2), wherein the support element (1) has coupling means (8) for selectively coupling the inner element (7) in its axially extended position with the housing (2 ), which inner element (6) from the housing (2) out by at least one lost-motion spring (9) is acted upon, characterized in that the coupling means (8) are designed as at least one slide, in the decoupling in a radially or secant-like running guide (10) of the housing (2) is positioned and, starting from its radially inner end (11), a flattened top (12) immanent over which it flattened in the coupling case Bottom (13) of a recess (14) in the outer casing (15) of the inner member (7) is engageable.
2. Abstützelement nach Anspruch 1 , dadurch gekennzeichnet, dass die Ausnehmung (14) des Innenelements (7) entweder als Querschlitz mit sekantenartig-geradem Schlitzgrund (16) oder ringsegmentartig / sichel- artig im Außenmantel (15) des Innenelements (7) auf der Seite des jeweiligen Schiebers als Koppelmittel (8) dargestellt ist.2. Supporting element according to claim 1, characterized in that the recess (14) of the inner element (7) either as a transverse slot with secant-even slit bottom (16) or ring segment / sickle-like in the outer jacket (15) of the inner element (7) on the Side of the respective slider is shown as coupling means (8).
3. Abstützelement nach Anspruch 1 , dadurch gekennzeichnet, dass die Ausnehmung (14) des Innenelements (7) als umlaufende Ringnut ausgebildet ist. 3. Supporting element according to claim 1, characterized in that the recess (14) of the inner element (7) is designed as a circumferential annular groove.
4. Abstützelement nach Anspruch 1 , dadurch gekennzeichnet, dass genau zwei sich diametral gegenüberliegende Schieber als Koppelmittel (8) in der Führung (10) des Gehäuses (2) vorgesehen sind.4. Supporting element according to claim 1, characterized in that exactly two diametrically opposed slide as coupling means (8) in the guide (10) of the housing (2) are provided.
5. Abstützelement nach Anspruch 1 oder 4, dadurch gekennzeichnet, dass der jeweilige Schieber als Koppelmittel (8) als Kolben und dass dessen Führung (10) im Gehäuse (2) als Bohrung ausgebildet sind, wo- bei dessen abgeflachte Oberseite (12) Bestandteil einer stufenartigen5. Supporting element according to claim 1 or 4, characterized in that the respective slide as a coupling means (8) as a piston and that its guide (10) in the housing (2) are formed as a bore, whereby its flattened top (12) component a step-like
Materialfreistellung, ausgehend von seiner radial inneren Stirn (11 ), ist.Materialfreistellung, starting from its radially inner end (11), is.
6. Abstützelement nach Anspruch 5, sofern auf Anspruch 4 rückbezogen, dadurch gekennzeichnet, dass eine Verlagerung der beiden Schieber als Koppelmittel (8) in Koppelrichtung über die Kraft wenigstens einer bügel- o. klammerähnlichen, nach innen vorgespannten Feder (16a) dargestellt ist, welche am Außenmantel (3) des Gehäuses (2) entweder anliegt oder in einer Umlaufnut (17) im Außenmantel (3) des Gehäuses (2) geführt ist und mit ihren Endstücken (18) oder Bereichen ihres Innenmantels auf äußere Stirnseiten (19) der Schieber als Koppelmittel (8) einwirkt.6. Supporting element according to claim 5, if dependent on claim 4, characterized in that a displacement of the two slides as coupling means (8) in the coupling direction on the force of at least one ironing o. Staple-like, inwardly biased spring (16 a) is shown, which either rests against the outer casing (3) of the housing (2) or is guided in a circumferential groove (17) in the outer casing (3) of the housing (2) and with its end pieces (18) or areas of its inner casing on outer end faces (19) Slider acts as a coupling agent (8).
7. Abstützelement nach Anspruch 6, dadurch gekennzeichnet, dass die Endstücke (18) der Feder (16a) mit einem radienhaft eingewölbten Bereich zum Verdrehsicherungszweck in Längsschlitzen (20) der äußeren Stirnseiten (19) der Schieber als Koppelmittel (8) einsitzen. 7. Supporting element according to claim 6, characterized in that the end pieces (18) of the spring (16a) with a curved vaulted area for securing against rotation in longitudinal slots (20) of the outer end faces (19) of the slide as coupling means (8).
8. Abstützelement nach Anspruch 2, dadurch gekennzeichnet, dass zwischen Innenelement (6) und Gehäuse (2) eine Verdrehsicherung (21 ) appliziert ist.8. Supporting element according to claim 2, characterized in that between inner element (6) and housing (2) an anti-rotation device (21) is applied.
9. Abstützelement nach Anspruch 8, dadurch gekennzeichnet, dass als Verdrehsicherung (21 ) ein Stift / eine Kugel vorgesehen ist, der / die in einer Ausnehmung (22) des einen Bauteils (Gehäuse (2) oder Innenelement (6)) befestigt ist und mit einer Längsaussparung (23) am jeweils anderen Bauteil (Innenelement (6) oder Gehäuse (2)) kommuniziert.9. Support element according to claim 8, characterized in that as rotation (21) a pin / a ball is provided, which in a recess (22) of the one component (housing (2) or inner element (6)) is attached and with a longitudinal recess (23) on the respective other component (inner element (6) or housing (2)) communicates.
10. Abstützelement nach Anspruch 9, dadurch gekennzeichnet, dass im Fall des in der Ausnehmung (22) des Gehäuses (2) befestigten Stiftes als Verdrehsicherung (21 ) dieser eine von seiner radial inneren Stirnseite (24) ausgehende, abgeflachte Unter- und Oberseite (25, 26) besitzt, die als beidendige Höhenanschläge mit gegenüberliegenden Anschlagflächen (27, 28) der Längsaussparung (23) am Innenelement (6) kommunizieren, wobei im Fall der axial ausgefahrenen Anschlagposition des Innenelements (7) eine Lagezuordnung der Schieber als Koppelmittel10. Supporting element according to claim 9, characterized in that in the case of the recess (22) of the housing (2) fixed pin as rotation (21) of this one of its radially inner end face (24) outgoing, flattened bottom and top ( 25, 26) which communicate at both ends with opposite abutment surfaces (27, 28) of the longitudinal recess (23) on the inner element (6), wherein in the case of the axially extended stop position of the inner element (7) a positional assignment of the slide as coupling means
(8) zu ihren Ausnehmungen (14) des Innenelements (7) dargestellt ist.(8) to its recesses (14) of the inner element (7) is shown.
11.Abstützelement nach Anspruch 10, dadurch gekennzeichnet, dass eine Einstellung eines Koppelspiels über den Stift als Verdrehsicherung (21 ) bewerkstelligt ist, der hinsichtlich einer Höhe seiner Unterseite (25) gruppiert vorgehalten ist.11.Abstützelement according to claim 10, characterized in that an adjustment of a coupling play on the pin as rotation (21) is accomplished, which is held in groups with respect to a height of its underside (25).
12. Abstützelement nach Anspruch 1 , dadurch gekennzeichnet, dass eine Einstellung eines Koppelspiels über den jeweiligen Schieber als Kop- pelmittel (8) hergestellt ist, der hinsichtlich einer Höhe seiner Oberseite (12) gruppiert vorgehalten ist.12. Supporting element according to claim 1, characterized in that an adjustment of a coupling play over the respective slide as Kop- pelmittel (8) is made, which is held in groups with respect to a height of its top (12).
13.Abstützelement nach Anspruch 1 , dadurch gekennzeichnet, dass das Abstützelement (1 ) mit hydraulischem Spielausgleich versehen ist.13.Abstützelement according to claim 1, characterized in that the supporting element (1) is provided with hydraulic clearance compensation.
14. Abstützelement nach Anspruch 13, dadurch gekennzeichnet, dass in einer Bohrung (29) des Innenelements (7) ein einen Vorratsraum (30) für14. Supporting element according to claim 13, characterized in that in a bore (29) of the inner element (7) has a storage space (30) for
Hydraulikmittel einschließender Druckkolben (31 ) als Bestandteil des Innenelements (7) verläuft, welcher Druckkolben (31 ) den Kopf (5) hat, wobei an einem kopffernen Quersteg (32) des Druckkolbens (31 ) ein Rückschlagventil (33) verläuft und axial zwischen dem Quersteg (32) und einem kopffernen Grund (34) des Innenelements (7) ein Hochdruckraum (35) für das Hydraulikmittel gebildet ist und wobei die Ausnehmung (14) für den Schieber als Koppelmittel (8) am Außenmantel (15) des Innenelements (7) zumindest abschnittsweise radial neben dem Hochdruckraum (35) oder höher liegt.Hydraulic fluid enclosing pressure piston (31) as part of the inner member (7), which pressure piston (31) has the head (5), wherein at a head remote crosspiece (32) of the pressure piston (31), a check valve (33) extends and axially between the Cross bar (32) and a head remote base (34) of the inner member (7) is formed a high-pressure chamber (35) for the hydraulic means and wherein the recess (14) for the slide as a coupling means (8) on the outer casing (15) of the inner element (7 ) is at least partially radially adjacent to the high-pressure chamber (35) or higher.
15. Abstützelement nach Anspruch 1 , dadurch gekennzeichnet, dass als Lost-Motion-Feder (9) eine oder mehrere Schraubendruckfedern vorgesehen sind, die einenends gegen eine Unterseite (36) des Innenele- ments (7) und anderenends gegen einen Boden (37) des topfartigen15. A support element according to claim 1, characterized in that as a lost-motion spring (9) one or more helical compression springs are provided, the one end against a bottom (36) of the inner element (7) and the other end against a bottom (37). of the cup-like
Gehäuses (2) wirken.Housing (2) act.
16. Abstützelement nach Anspruch 1 , dadurch gekennzeichnet, dass eine Verlagerung des wenigstens einen Schiebers als Koppelmittel (8) in Entkoppelrichtung über Hydraulikmittel herstellbar ist, für dessen Zuleitung am Außenmantel (3) des Gehäuses (2) eine Ringnut (38) oder eine Aus- sparung wie eine Bohrung axial unterhalb der jeweiligen Führung (10) verläuft, von der aus das Hydraulikmittel über zumindest eine Querbohrung (39) durch das Gehäuse (2) in die Ausnehmung (14) radial innen vor die Stirn (1 1 ) des Schiebers als Koppelmittel (8) leitbar ist. 16. Supporting element according to claim 1, characterized in that a displacement of the at least one slide as coupling means (8) in Entkoppelrichtung via hydraulic means can be produced for the supply line to the outer casing (3) of the housing (2) has an annular groove (38) or an off - savings as a bore extends axially below the respective guide (10), from which the hydraulic fluid via at least one transverse bore (39) through the housing (2) in the recess (14) radially inwardly in front of the end (1 1) of the slider as Coupling means (8) is conductive.
EP07847766.8A 2007-01-18 2007-12-04 Switchable support element for a valve drive of an internal combustion engine Not-in-force EP2102455B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007002787A DE102007002787A1 (en) 2007-01-18 2007-01-18 Switchable support element for a valve train of an internal combustion engine
PCT/EP2007/063263 WO2008086913A1 (en) 2007-01-18 2007-12-04 Switchable support element for a valve drive of an internal combustion engine

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EP2102455B1 EP2102455B1 (en) 2017-02-22

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EP (1) EP2102455B1 (en)
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DE102007002787A1 (en) 2008-07-24
US8136495B2 (en) 2012-03-20
US20100059001A1 (en) 2010-03-11
WO2008086913A1 (en) 2008-07-24
EP2102455B1 (en) 2017-02-22

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